Re: [net-next v1 08/16] memory-provider: dmabuf devmem memory provider

On 12/12/23 6:09 PM, Mina Almasry wrote:

OK, I imagine this is not that hard to implement - it's really whether the change is acceptable to reviewers.

I figure I can start by implementing a no-op abstraction to page*:

typedef struct page netmem_t

and replace the page* in the following places with netmem_t*:

1. page_pool API (not internals)
2. drivers using the page_pool.
3. skb_frag_t.

accessors to skb_frag_t field are now consolidated to include/linux/skbuff.h (the one IB driver was fixed in Sept by 4ececeb83986), so changing skb_frag_t from bio_vec to something like:

typedef struct skb_frag { void *addr; unsigned int length; unsigned int offset; };

is trivial. From there, addr can default to `struct page *`. If LSB is set, strip it and return `struct page_pool_iov *` or `struct buffer_pool *`